Manny Pacquiao of the Philippines celebrates after defeating American Shane Mosley during their bout for the World Boxing Organization welterweight title at the Garden Arena in the MGM Grand in Las Vegas, Nevada on Saturday, May 7.

Manny Pacquiao of the Philippines celebrates after defeating American Shane Mosley during their bout for the World Boxing Organization welterweight title at the Garden Arena in the MGM Grand in Las Vegas, Nevada on Saturday, May 7.

Performer LL Cool J sings, "Mama Said Knock You Out" as boxer Shane Mosley enters the ring to take on Manny Pacquiao of the Philippines in their WBO welterweight title fight at the MGM Grand Garden Arena May 7, 2011 in Las Vegas, Nevada.

Performer LL Cool J sings, "Mama Said Knock You Out" as boxer Shane Mosley enters the ring to take on Manny Pacquiao of the Philippines in their WBO welterweight title fight at the MGM Grand Garden Arena May 7, 2011 in Las Vegas, Nevada.

Actor/singer Jamie Foxx (L) and actor/singer Tyrese Gibson performed in the ring before the welterweight title fight between Manny Pacquiao and Shane Mosley at the MGM Grand Garden Arena on Saturday in Las Vegas, Nevada.

Actor/singer Jamie Foxx (L) and actor/singer Tyrese Gibson performed in the ring before the welterweight title fight between Manny Pacquiao and Shane Mosley at the MGM Grand Garden Arena on Saturday in Las Vegas, Nevada.

Manny Pacquiao of the Philippines looks on (maybe pondering who his next challenger will be?) during the postfight news conference after he defeated Shane Mosley by unanimous decision in the WBO welterweight title fight in Las Vegas, Nevada.

Manny Pacquiao of the Philippines looks on (maybe pondering who his next challenger will be?) during the postfight news conference after he defeated Shane Mosley by unanimous decision in the WBO welterweight title fight in Las Vegas, Nevada.